. >> like most people, bill holloway commutes to work, driving 75 miles from his home in alameda, california. but then again, most people don't make their commute in a hydrogen fuel cell vehicle. >> i drive a very rare car. there's only a handful on lease here in northern california. >> this rare car uses hydrogen instead of gasoline and emits only water vapor instead of harmful pollution. >> the economy of this mercedes is great. i average 58 miles per kilogram of hydrogen, the same as 58 miles in gas. i picked the hydrogen car because i was able to drive one of the early models and i'm kind of a geek. >> carmakers have spent more than a decade and invested billions to develop the technology. catherine dunwoody, executive director of the california fuel cell partnership, thinks that investment is about to pay off. >> having been involved in this now for 15 years and seeing the evolution of the technology, you know, these guys are serious. they really see the fuel cell vehicle as the future of automotive technology. >> in 2014, hyundai will release a new fuel cell suv in california. followed